mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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122 lines
3.7 KiB
C++
122 lines
3.7 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2015 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_RANGE_ADAPTOR_VALUED_HPP
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#define SPROUT_RANGE_ADAPTOR_VALUED_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/container/traits.hpp>
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#include <sprout/container/functions.hpp>
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#include <sprout/iterator/valued_iterator.hpp>
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#include <sprout/range/adaptor/detail/adapted_range_default.hpp>
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#include <sprout/type_traits/lvalue_reference.hpp>
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#include <sprout/utility/forward.hpp>
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#include <sprout/utility/lvalue_forward.hpp>
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namespace sprout {
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namespace adaptors {
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//
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// valued_range
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//
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template<typename Range, typename T>
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class valued_range
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: public sprout::adaptors::detail::adapted_range_default<
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Range,
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sprout::valued_iterator<typename sprout::container_traits<Range>::iterator, T>
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>
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{
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public:
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typedef sprout::adaptors::detail::adapted_range_default<
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Range,
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sprout::valued_iterator<typename sprout::container_traits<Range>::iterator, T>
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> base_type;
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typedef typename base_type::range_type range_type;
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typedef typename base_type::iterator iterator;
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typedef typename iterator::param_type param_type;
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public:
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SPROUT_CONSTEXPR valued_range() SPROUT_DEFAULTED_DEFAULT_CONSTRUCTOR_DECL
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valued_range(valued_range const&) = default;
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SPROUT_CONSTEXPR valued_range(param_type param, range_type& range)
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: base_type(
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iterator(sprout::begin(range), param),
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iterator(sprout::end(range), param)
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)
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{}
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};
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//
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// valued_holder
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//
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template<typename T>
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class valued_holder {
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public:
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typedef T content_type;
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typedef sprout::value_holder<T> holder_type;
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typedef typename holder_type::param_type param_type;
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typedef typename holder_type::mutable_or_const_reference get_type;
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private:
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holder_type holder_;
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public:
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SPROUT_CONSTEXPR valued_holder() SPROUT_DEFAULTED_DEFAULT_CONSTRUCTOR_DECL
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valued_holder(valued_holder const&) = default;
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explicit SPROUT_CONSTEXPR valued_holder(param_type param)
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: holder_(param)
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{}
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SPROUT_CONSTEXPR get_type get() const {
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return holder_.get();
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}
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};
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//
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// valued_forwarder
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//
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class valued_forwarder {
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public:
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template<typename T>
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SPROUT_CONSTEXPR sprout::adaptors::valued_holder<T>
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operator()(T const& param) const {
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return sprout::adaptors::valued_holder<T>(param);
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}
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};
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//
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// valued
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//
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namespace {
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SPROUT_STATIC_CONSTEXPR sprout::adaptors::valued_forwarder valued = {};
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} // anonymous-namespace
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//
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// operator|
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//
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template<typename Range, typename T>
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inline SPROUT_CONSTEXPR sprout::adaptors::valued_range<
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typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type,
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T
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>
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operator|(Range&& lhs, sprout::adaptors::valued_holder<T> const& rhs) {
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return sprout::adaptors::valued_range<
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typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type,
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T
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>(
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rhs.get(),
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sprout::lvalue_forward<Range>(lhs)
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);
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}
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} // namespace adaptors
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//
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// container_construct_traits
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//
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template<typename Range, typename T>
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struct container_construct_traits<sprout::adaptors::valued_range<Range, T> >
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: public sprout::container_construct_traits<typename sprout::adaptors::valued_range<Range, T>::base_type>
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{};
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} // namespace sprout
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#endif // #ifndef SPROUT_RANGE_ADAPTOR_VALUED_HPP
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